Preparing PU foaming color paste requires following certain process steps and techniques. The following is the general color mixing method:
Prepare the basic color paste: First prepare the basic color paste, usually white or transparent PU color paste is used as the base color. This ensures that it is easier to control the depth and saturation of the color during subsequent color grading.
Choose paint: Choose the right paint for color mixing. The pigment can be pigment slurry or pigment powder. For PU foaming color paste, pigments suitable for PU materials are usually selected to ensure color stability and durability.
Add pigment in proportion: According to the required color, add pigment to the basic color paste in a certain proportion. It's best to experiment on a small scale first and gradually adjust the proportions of pigments added until the desired color effect is achieved.
Stir and mix thoroughly: After adding the pigment, use a stirring device to stir and mix thoroughly to ensure that the pigment is evenly dispersed in the base color paste. Stirring time and speed need to be properly controlled to ensure that the pigments are fully dissolved and mixed.
Adjust color: Gradually adjust the depth and saturation of the color according to actual needs. Color swatches or color samples can be compared and adjusted until the ideal color effect is achieved.
Conduct experiments and adjustments: The prepared color paste can be used in a small range of experiments to observe its performance on PU foam materials, and make necessary adjustments and improvements based on the actual results.
Record the formula: Once a satisfactory color effect is achieved, be sure to record the color mixing formula, including the type of pigment, addition ratio and other information, for future use or adjustment.
